Table.

Results of within- and between-group effects for pre- and post-changes in scores of quality of life (QoL) and depression

QoL	Mean±SD		Within-group effect		Between-group effect (i.e., time×group interaction)
	Pre	Post	Wilcoxon Z	P	Wilks’ lambda (df=1, 58)	P	Effect size (ηp2)
WHO-QoL total
CABG	2.7±0.97	3.1±0.84	3.44	0.001	0.5	0.46	0.009
PTCA	2.5±0.63	3.0±0.78	3.14	0.002
Domains of WHO-QoL
Physical
CABG	13.2±2.3	15.9±3.2	3.86	<0.001	1	0.321	0.017
PTCA	13.4±2.7	16.9±3.9	4.10	<0.001
Psychological
CABG	15±1.8	16.8±3.7	2.78	0.005	1	0.28	0.020
PTCA	14.9±1.9	15.7±3.2	1.36	0.17
Social relationship
CABG	7.8±1.8	8.4±2.43	1.28	0.20	0.28	0.60	0.005
PTCA	8.4±1.9	8.8±2.31	0.76	0.45
Environment
CABG	19±2.3	20.0±2.8	0.99	0.32	2.2	0.14	0.037
PTCA	18.4±2.6	183±2.8	0.63	0.53
HDRS
CABG	17.33±6.51	10.90±5.56	4.24	<0.001	0.97	0.21	0.027
PTCA	16.47±5.24	11.80±5.24	3.82	<0.001

CABG, coronary artery bypass graft; PTCA, percutaneous coronary angioplasty; HDRS, Hamilton Depression Rating Scale; SD, standard deviation